Manifold Pressure/Vacuum Sensor: Description and Operation

The manifold differential pressure sensor converts the intake manifold plenum pressure to a voltage signal and inputs it to the engine control module (ECM). The ECM confirms the operation of the EGR system from this signal, and if there is any error in the EGR system, sets a diagnostic fault code.

5V power is supplied to the manifold differential pressure sensor from the ECM, and the sensor circuit ground is located within the ECM.

The manifold differential pressure sensor output voltage is proportional to the intake manifold plenum pressure.